Sujin was born on Wednesday, June 26, 1996, Like fellow member Woojoo, she was born in the Chinese Year of the Rat. Her zodiac star sign is Cancer and her blood type is AB.

At a height of 163 cm or 5'4", she's the shortest member of the group. The height difference between her and the tallest member, Jiae, is 5 cm.

She graduated from Seoul Korea Arts High School.

Sujin was in the KBS drama "An Angel's Revenge" and had a minor role in the 2013 movie Top Star. Before debut, she was a model for VAGX. Her dream is to design clothes of her own brand. This is in contrast to her childhood dream of becoming a gardening teacher.

She has two younger brothers, and she stays in close contact with them. Her favorite artist is Jay Park.